AGRMENT CERTIFICATION OF THIN LAYER ASPHALT

1
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT
Dennis Rossmann RPF - May 2005
2
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

• Ultra thin friction course layers have been
  constructed in Europe since 1990. Tens of
  millions of m2 have been paved.
• Most are produced under Agrément or similar
  certification

3
USE OF UTFC LAYER
Toll concession route in FranceLength 1821
kmsAADT 24300ADTT 20
4
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT
UTFC seal or asphalt????

• A system (layer bond coat)

5
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

• First Introduced in SA in 1998
• Currently 2 proprietary products being produced
  under international licence
• SA designed and manufactured products also
  available.

6
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT
Products have differing material properties and
design requirements!

• PPGS ???

7
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

• To develop performance criteria where, for
  proprietary and innovative construction products,
  there are no relevant standards

8
AGRÈMENT PERFORMANCE CRITERIA FOR THIN LAYER
ASPHALT

• Industry task team
• Joe Odhiambo Agrèment SA
• Joop van Wamelen Agrèment SA
• Basie Nothnagel Agrèment
• Kim Jenkins Stellenbosch Univiersity
• Piet Myburg SABITA
• Elizabeth Sadzik Gautrans
• Dennis Rossmann SANRAL
• Mervyn Henderson PAWC
• Pat Olivier SAACE
• Gary Swart SAACE
• Derek Pretorius SAACE
• Julian Wise/Mike Winfield SAFCEC
• Wynand Steyn CSIR
• Benoit Verhaege CSIR

9
CERTIFICATION PROGRAMME TERMS OF REFERENCE (1)
Client /Road owners perspective

• Both manufacturers and applicators must be
  included in the certification process (no split
  responsibility)
• Aggregate producers need to be included
• Certification process must accommodate
  possible different designs
• Procurement process for these products must
  be transparent to all stakeholders

10
CERTIFICATION PROGRAMME TERMS OF REFERENCE (2)

• Applicant or certificate holders perspective

• Certification must be for specific uses of the
  product and must highlight inappropriate
  applications
• Quality management will be responsibility of
  manufacturer as well as applicator (either can
  be certificate holder)
• Certification will be conducive to consensus
  w.r.t performance guarantee requirements
  certification will be an adjunct to the
  performance guarantee
• Certification will bring clarity on the
  durability or functional lifetime of the
  product.
• The certification process must be as cheap as
  possible (size of SA market)

11
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

• International Scene
• BBA guidelines to serve as basis for Agrément SA
  performance criteria

12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
CERTIFICATION PROCESS

• Selected issues to be addressed
• What is defined as thin-layer asphalt?
• European test methods adapted to SA standards
• Wheel tracking or MMLS testing
• Inclusion of mobile plants (project specific
  quarries)
• Appropriate application of products
• Support stiffness/condition/porosity
• Traffic classes
• Surface texture (pre-treatment requirements)
• Quality assurance plans
• Performance property assessments

16
CERTIFICATION PROGRAMME
17
AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT
Conclusions

• UTFC layersnot new
• Certification not new
• Certification will enhance quality
• Certification will promote transparent
  procurement